Configuration Files
The TFTP server stores the device configuration files that define parameters for connection to Cisco Unified Communications Manager. In general, any time you make a change in Cisco Unified communications Manager that requires the device to be reset, a change is automatically made to the configuration file.
Configuration files also contain information about the image load that the device should be running. If this image load differs from the one that is currently loaded on a device, the device contacts the TFTP server to request the required load files. Due to the size of the image loads it is mandatory that TCP port 6970 be open between the device and the TFTP server.
A device accesses a default configuration file, named XmlDefault.cnf.xml, from the TFTP server when the following conditions exist:
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You enable autoregistration in Cisco Unified Communications Manager.
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You have not added the device to the Cisco Unified Communications Manager database.
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The device registers for the first time.
Note |
If the device security mode in the configuration file is set to Authenticated or Encrypted, but the device has not received a CTL or ITL file, the device makes four attempts to obtain the file so the device can register securely. |
If autoregistration is not enabled and the device has not been added to the Cisco Unified Communications Manager database, the registration request will be rejected. The device displays Out of service on the screen.
Cisco DX Series devices access the configuration file, SEPmac_address.cnf.xml, where mac_address is the Ethernet MAC address of the device. The device will instead access the configuration file named SEPmac_address.cnf.xml.sgn if a CTL or ITL file is installed. The Description field in the Phone Configuration window of Cisco Unified Communications Manager Administration is prepopulated when the device is first configured. The MAC address identifies the device uniquely.